U.S. patent application number 15/762064 was filed with the patent office on 2018-11-01 for method and terminal for implementing uplink power control.
The applicant listed for this patent is ZTE CORPORATION. Invention is credited to Bo DAI, Huiying FANG, Shupeng LI, Weimin LI, Kun LIU, Weiwei YANG, Yifei YUAN.
Application Number | 20180317180 15/762064 |
Document ID | / |
Family ID | 59481333 |
Filed Date | 2018-11-01 |
United States Patent
Application |
20180317180 |
Kind Code |
A1 |
LI; Weimin ; et al. |
November 1, 2018 |
METHOD AND TERMINAL FOR IMPLEMENTING UPLINK POWER CONTROL
Abstract
A method and a terminal for uplink power control are disclosed.
The method comprising: determining the uplink transmit power by a
terminal according to a transmission scenario in which the terminal
belongs. In embodiments of present disclosure, uplink transmit
power is determined by a terminal for uplink transmission, wherein
a scheme of uplink power control is achieved.
Inventors: |
LI; Weimin; (Guangdong,
CN) ; DAI; Bo; (Guangdong, CN) ; YUAN;
Yifei; (Guangdong, CN) ; FANG; Huiying;
(Guangdong, CN) ; LIU; Kun; (Guangdong, CN)
; YANG; Weiwei; (Guangdong, CN) ; LI; Shupeng;
(Guangdong, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
ZTE CORPORATION |
Guangdong |
|
CN |
|
|
Family ID: |
59481333 |
Appl. No.: |
15/762064 |
Filed: |
March 2, 2017 |
PCT Filed: |
March 2, 2017 |
PCT NO: |
PCT/CN2017/072852 |
371 Date: |
March 21, 2018 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H04W 72/085 20130101;
H04W 52/242 20130101; H04W 52/146 20130101; H04W 52/367 20130101;
H04W 52/365 20130101 |
International
Class: |
H04W 52/14 20060101
H04W052/14; H04W 72/08 20060101 H04W072/08; H04W 52/36 20060101
H04W052/36 |
Foreign Application Data
Date |
Code |
Application Number |
Jan 11, 2016 |
CN |
201610018690.2 |
Feb 5, 2016 |
CN |
201610081444.1 |
Claims
1-26. (canceled)
27. A method performed by a wireless communication device,
comprising: determining a first uplink transmit power for a first
transmission mode according to a formula: min{Pmax,10*log
10(M)+Po+alpha*PL}, wherein Pmax is a maximum transmit power of the
wireless communication device, Po is a target received power
parameter, PL is a downlink path loss estimated by the wireless
communication device, alpha is a path loss compensation factor, M
is a resource bandwidth comprising a number of subcarriers; and
wherein the target received power parameter Po is a sum of a common
power parameter Po_nominal and a specific power parameter
Po_UE.
28. The method of claim 27, further comprising: determining a
second uplink transmit power for a second transmission mode,
different from the first transmission mode, according to the
formula, using a same power parameter to determine the first and
second uplink transmit powers, and determining respective resource
bandwidths used to determine the first and second uplink transmit
powers according to a preconfigured transmission mode that includes
one of the following: a first single tone transmission with a first
bandwidth, a second single tone transmission with a second
bandwidth, and a multi-tone transmission with a third
bandwidth.
29. The method of claim 28, further comprising: determining a Power
Headroom Report (PHR) as a difference between the maximum transmit
power of the wireless communication device and an uplink transmit
power determined based on a preconfigured transmission scenario,
wherein the preconfigured transmission scenario comprises at least
one of the following: single-tone transmission, a channel type
being a Narrow Band-Physical Uplink Shared Channel (NB-PUSCH), and
transmitting traffic data.
30. The method of claim 28, wherein determining respective resource
bandwidths used to determine the first and second uplink transmit
powers according to a preconfigured transmission mode comprises:
determining the resource bandwidth used to determine the first
uplink transmit power according to a first difference between a
bandwidth of the preconfigured transmission mode and a bandwidth of
the first transmission mode; and determining the resource bandwidth
used to determine the second uplink transmit power according to a
second difference between the bandwidth of the preconfigured
transmission mode and a bandwidth of the second transmission
mode.
31. The method of claim 27, wherein the path loss compensation
factor, alpha, is equal to 1.
32. A non-transitory computer-readable medium having stored thereon
computer-executable instructions for carrying out any one of claims
27 through 31.
33. An apparatus, comprising: a memory; and at least one processor
coupled to the memory, the at least one processor configured to:
determine a first uplink transmit power for a first transmission
mode according to a formula: min{Pmax,10*log 10(M)+Po+alpha*PL},
wherein Pmax is a maximum transmit power of the apparatus, Po is a
target received power parameter, PL is a downlink path loss
estimated by the apparatus, alpha is a path loss compensation
factor, M is a resource bandwidth comprising a number of
subcarriers; and wherein the target received power parameter Po is
a sum of a common power parameter Po_nominal and a specific power
parameter Po_UE.
34. The apparatus of claim 33, wherein the at least one processor
is further configured to: determine a second uplink transmit power
for a second transmission mode, different from the first
transmission mode, according to the formula, use a same common
power parameter to determine the first and second uplink transmit
powers, and determine respective resource bandwidths used to
determine the first and second uplink transmit powers according to
a preconfigured transmission mode that includes one of the
following: a first single-tone transmission with a first bandwidth,
a second single-tone transmission with a second bandwidth, and a
multi-tone transmission with a third bandwidth.
35. The apparatus of claim 34, wherein the at least one processor
is further configured to: determine a Power Headroom Report (PHR)
as a difference between the maximum transmit power of the apparatus
and an uplink transmit power determined based on a preconfigured
transmission scenario, wherein the preconfigured transmission
scenario comprises at least one of the following: single-tone
transmission, a channel type being a Narrow Band-Physical Uplink
Shared Channel (NB-PUSCH), and transmitting traffic data.
36. The apparatus of claim 34, wherein when determining respective
resource bandwidths used to determine the first and second uplink
transmit powers according to a preconfigured transmission mode, the
at least one processor is further configured to: determine the
resource bandwidth used to determine the first uplink transmit
power according to a first difference between a bandwidth of the
preconfigured transmission mode and a bandwidth of the first
transmission mode; and determine the resource bandwidth used to
determine the second uplink transmit power according to a second
difference between the bandwidth of the preconfigured transmission
mode and a bandwidth of the second transmission mode.
37. A method performed by a wireless communication device,
comprising: determining a first uplink transmit power for a first
transmission mode according to a formula: min{Pmax,10*log
10(M)+Po+alpha*PL+Delta+fi}, wherein Pmax is a maximum transmit
power of the wireless communication device, Po is a target received
power parameter, PL is a downlink path loss estimated by the
wireless communication device, alpha is a path loss compensation
factor, Delta is a power offset, fi is a power adjustment amount,
and M is a resource bandwidth comprising a number of resource
blocks that is determined according to a preconfigured transmission
mode that includes one of the following: a first multi-tone
transmission with a first bandwidth, and a second multi-tone
transmission with a second bandwidth; wherein the target received
power parameter Po is a sum of a common power parameter Po_nominal
and a specific power parameter Po_UE.
38. The method of claim 37, wherein the resource bandwidth M is
further determined according to the a difference between a
bandwidth of the preconfigured transmission mode and a bandwidth of
the first transmission mode.
39. A non-transitory computer-readable medium having stored thereon
computer-executable instructions for carrying out any one of claims
37 through 38.
40. An apparatus, comprising: a memory; and at least one processor
coupled to the memory, the at least one processor configured to:
determine a first uplink transmit power for a first transmission
mode according to a formula: min{Pmax,10*log
10(M)+Po+alpha*PL+Delta+fi}, wherein Pmax is a maximum transmit
power of the wireless communication device, Po is a target received
power parameter, PL is a downlink path loss estimated by the
wireless communication device, alpha is a path loss compensation
factor, Delta is a power offset, fi is a power adjustment amount,
and M is a resource bandwidth comprising a number of resource
blocks that is determined according to a preconfigured transmission
mode that includes one of the following: a first multi-tone
transmission with a first bandwidth, and a second multi-tone
transmission with a second bandwidth; wherein the target received
power parameter Po is a sum of a common power parameter Po_nominal
and a specific power parameter Po_UE.
41. The apparatus of claim 40, wherein the resource bandwidth M is
further determined according to the a difference between a
bandwidth of the preconfigured transmission mode and a bandwidth of
the first transmission mode.
Description
TECHNICAL FIELD
[0001] The present application relates to, but is not limited to,
wireless communication technology, and more particularly to a
method and a terminal for implementing uplink power control.
BACKGROUND
[0002] In order to meet the coverage needs of harsh environments
(such as indoor, basement, etc.), to reduce equipment power
consumption and equipment costs, and to achieve large-scale
deployment of low-complexity, low-speed communications equipment,
3GPP (Third Generation Partnership Project, Partner Program)
conducted a feasibility study and evaluation of a cellular network
IoT (Internet of Things) system which is based on a 200 kHz
narrowband.
[0003] At present, Release 13 version of the LTE (Long Term
Evolution) communication system is designing schemes and discussing
the standardization of the technology of the NB-IoT (Narrowband
Internet of Things) technology, which including the frame
structure, uplink and downlink channels and signal design and so
on. However, the uplink power control scheme for NB-IoT has not yet
been designed.
SUMMARY
[0004] A summary of the subject matters described in the present
disclosure will be given below. The scopes of the claims are not
limited to the summary.
[0005] The embodiments of present disclosure provides a method and
a apparatus of Ser. No. 18/708,593 uplink power control, capable of
controlling uplink power.
[0006] The embodiments of present disclosure provide a method
performed by a terminal for uplink power control. The method
includes: determining an uplink transmit power according to a
transmission scenario to which the terminal belongs.
[0007] In an exemplary embodiment, before determining the uplink
transmit power, the method further comprising: determining the
transmission scenario to which the terminal belongs according to at
least one of the following factors: a transmission capability or
mode, number of subcarriers, a coverage level, a channel type, and
information to be transmitted.
[0008] In an exemplary embodiment, the transmission capability or
mode comprises at least one of the following:
[0009] a single tone transmission of wherein a carrier bandwidth
being a first bandwidth;
[0010] a single tone transmission of wherein a carrier bandwidth
being a second bandwidth;
[0011] a multi-tone transmission of wherein a carrier bandwidth
being a third bandwidth;
[0012] a multi-tone transmission of wherein a carrier bandwidth
being a fourth bandwidth.
[0013] In an exemplary embodiment, the coverage level is one of a
preset number of levels preset by system, the preset number is an
integer greater than or equal to 1, and the levels comprise at
least one of the followings: the levels indicating different
coverage cases, the levels with different times of repetitions.
[0014] In an exemplary embodiment, the channel type comprises:
[0015] narrowband physical random access channel (NB-PRACH) or
[0016] narrowband physical uplink shared channel (NB-PUSCH);
[0017] In an exemplary embodiment, the information to be
transmitted comprises at least one of:
[0018] a random access preamble;
[0019] a random access procedure message Msg3;
[0020] traffic data, uplink control information, or the traffic
data and the uplink control information.
[0021] In an exemplary embodiment, the terminal determining the
uplink transmit power according to the transmission scenario
comprises:
[0022] when the transmission scenario to which the terminal belongs
is a first coverage level and a random access preamble is to be
transmitted through a narrowband physical random access channel
(NB-PRACH), determining the uplink transmit power according to a
first transmit power calculation formula and a first power control
parameter; or
[0023] when the transmission scenario to which the terminal belongs
is a second coverage level and a random access procedure message
Msg3, traffic data, uplink control information, or the traffic data
and the uplink control information are to be transmitted through a
narrowband physical uplink shared channel (NB-PUSCH) in a single
tone, determining the uplink transmit power according to a second
transmit power calculation formula and a second power control
parameter; or
[0024] when the transmission scenario to which the terminal belongs
is a third coverage level and a random access procedure message
Msg3, traffic data, uplink control information, or the traffic data
and the uplink control information are to be transmitted through
NB-PUSCH, determining the uplink transmit power according to a
third transmit power calculation formula and a third power control
parameter; or
[0025] when the transmission scenario to which the terminal belongs
is a fourth coverage level, determining a maximum transmit power as
the uplink transmit power; or
[0026] determining the uplink transmit power according to a
coverage level to which the terminal belongs and relationship
information between the coverage level and a power level preset by
a system.
[0027] In an exemplary embodiment, when determining the uplink
transmit power according to the coverage level to which the
terminal belongs and the relationship information between the
coverage level and the power level preset by the system, the method
further comprising:
[0028] adjusting the uplink transmit power according to a transmit
power control (TPC) command, wherein the adjustment comprises a
cumulative adjustment and an absolute adjustment.
[0029] In an exemplary embodiment, wherein the first transmit power
calculation formula comprises one of the following:
P=min{Pmax,PL+TargetPower+(Counter-1)*Step)};
P=min{Pmax,PL+TargetPower+Delta+(Counter-1)*Step)};
[0030] wherein P is the determined uplink transmit power, Pmax is a
maximum transmit power of the terminal, PL is a downlink path loss
estimated by the terminal, TargetPower is a preamble initial
received target power for random access, Delta is a power offset,
Counter is the number of random access, and Step is a power
increment step.
[0031] In an exemplary embodiment, wherein the first power control
parameter may include at least one of the following:
[0032] the preamble initial received target power for random access
(TargetPower), the power increment step (Step) and the power offset
(Delta).
[0033] In an exemplary embodiment, when different transmission
capabilities or modes are used,
[0034] the preamble initial received target powers (TargetPower)
for random access are different; or
[0035] the preamble initial received target powers (TargetPower)
for random access are the same, the power offset (Delta) comprises
a power demand deviation of different transmission capabilities or
modes;
[0036] wherein the transmission capabilities or modes comprises at
least one of the following: a single tone transmission of which a
carrier bandwidth being a first bandwidth; a single tone
transmission of which a carrier bandwidth being a second bandwidth;
a multi-tone transmission of which a carrier bandwidth being a
third bandwidth; a multi-tone transmission of which a carrier
bandwidth being a fourth bandwidth.
[0037] In an exemplary embodiment, wherein the power offset (Delta)
comprises a power demand deviation of different random access
preambles.
[0038] In an exemplary embodiment, the power increment steps (Step)
for different transmission capabilities or modes are different;
or
[0039] the power increment steps (Step) for different random access
preambles are different.
[0040] In an exemplary embodiment, wherein the second transmit
power calculation formula comprises one of the following
formulas:
P=min{Pmax,Po+PL};
P=min{Pmax,Po+PL+Delta};
P=min{Pmax,Po+PL+fi};
P=min{Pmax,Po+PL+Delta+fi};
P=min{Pmax,Po+alpha*PL};
P=min{Pmax,Po+alpha*PL+Delta};
P=min{Pmax,Po+alpha*PL+fi};
P=min{Pmax,Po+alpha*PL+Delta+fi};
[0041] wherein P is the determined uplink transmit power, Pmax is a
maximum transmit power of the terminal, Po is a target received
power parameter, PL is a downlink path loss estimated by the
terminal, alpha is a path loss compensation factor, Delta is a
power offset, and fi is a power adjustment amount;
[0042] wherein the target received power parameter Po is a sum of
common power parameter Po_nominal and a terminal specific power
parameter Po_UE.
[0043] In an exemplary embodiment, wherein the second power control
parameter comprises at least one of the following: the common power
parameter Po_nominal, the terminal specific power parameter Po_UE,
the path loss compensation factor alpha, and the power offset Delta
and a transmit power control (TPC) parameter.
[0044] In an exemplary embodiment, wherein the third transmit power
calculation formula comprises one of the following formulas:
P=min{Pmax,Po+PL};
P=min{Pmax,Po+PL+Delta};
P=min{Pmax,Po+PL+fi};
P=min{Pmax,Po+PL+Delta+fi};
P=min{Pmax,Po+alpha*PL};
P=min{Pmax,Po+alpha*PL+Delta};
P=min{Pmax,Po+alpha*PL+fi};
P=min{Pmax,Po+alpha*PL+Delta+fi};
P=min{Pmax,10*log 10(M)+Po+PL};
P=min{Pmax,10*log 10(M)+Po+PL+Delta};
P=min{Pmax,10*log 10(M)+Po+PL+fi};
P=min{Pmax,10*log 10(M)+Po+PL+Delta+fi};
P=min{Pmax,10*log 10(M)+Po+alpha*PL};
P=min{Pmax,10*log 10(M)+Po+alpha*PL+Delta};
P=min{Pmax,10*log 10(M)+Po+alpha*PL+fi};
P=min{Pmax,10*log 10(M)+Po+alpha*PL+Delta+fi};
[0045] wherein P is the determined uplink transmit power, Pmax is a
maximum transmit power of the terminal, Po is a target received
power parameter, PL is a downlink path loss estimated by the
terminal, alpha is a path loss compensation factor, Delta is a
power offset, and fi is a power adjustment amount;
[0046] wherein M is a transmission resource bandwidth and comprises
at least one of the following: number of subcarriers, number of
resource units, and number of resource blocks;
[0047] wherein the target received power parameter Po is a sum of
common power parameter Po_nominal and a terminal specific power
parameter Po_UE.
[0048] In an exemplary embodiment, wherein the third power control
parameter comprises at least one of the following: the transmission
resource bandwidth M, the common power parameter Po_nominal, the
terminal specific power parameter Po_UE, the path loss compensation
factor alpha, the power offset Delta, and a transmit power control
(TPC) parameter.
[0049] In an exemplary embodiment, wherein the random access
procedure message Msg3, the traffic data, the uplink control
information, or the traffic data and the uplink control information
are to be transmitted through the NB-PUSCH further comprises:
[0050] the random access procedure message Msg3, the traffic data,
the uplink control information, or the traffic data and the uplink
control information are to be transmitted through the NB-PUSCH by
using a single-tone transmission, and the transmission resource
bandwidth M being 1.
[0051] In an exemplary embodiment, when different transmission
capabilities or modes are used, at least one of the following
situations exist:
[0052] the path loss compensation factors alpha are different;
[0053] the common power parameters Po_nominal are different; or the
common power parameters Po_nominal are the same;
[0054] wherein, when the common power parameters Po_nominal are the
same, the terminal specific power parameter Po_UE comprises a power
demand deviation of different transmission capabilities or modes;
or the power offset Delta comprises a power demand deviation of
different transmission capabilities or modes; or the power
adjustment amount fi comprises a power demand deviation of
different transmission capabilities or modes; or the value of
transmission resource bandwidth M is set according to a difference
between a bandwidth of a preconfigured transmission capability or
mode and a bandwidth of one of various transmission capabilities or
modes;
[0055] wherein the transmission capability or mode comprises at
least one of the following: a single tone transmission of which a
carrier bandwidth being a first bandwidth, a single tone
transmission of which a carrier bandwidth being a second bandwidth,
a multi-tone transmission of which a carrier bandwidth being a
third bandwidth, and a multi-tone transmission of which a carrier
bandwidth being a fourth bandwidth.
[0056] In an exemplary embodiment, after determining the uplink
transmit power, the method further comprising: performing an uplink
transmission using the determined uplink transmit power.
[0057] In an exemplary embodiment, further comprising:
[0058] generating a power headroom report (PHR) according to a
preconfigured transmission scenario and transmitting the power
headroom report through NB-PUSCH,
[0059] wherein the preconfigured transmission scenario comprises at
least one of the following:
[0060] a single tone transmission;
[0061] a channel type being NB-PUSCH;
[0062] transmitting traffic data, uplink control information, or
the traffic data and the uplink control information.
[0063] In an exemplary embodiment, the present disclosure also
provides a terminal for implementing uplink power control,
comprising:
[0064] a power determination unit, configured to determine uplink
transmit power based on a transmission scenario to which the
terminal belongs.
[0065] In an exemplary embodiment, further comprising a scenario
determination unit, configured to determine the transmission
scenario to which the terminal belongs according to at least one of
the following factors:
[0066] transmission capability or mode, number of subcarriers,
coverage level, channel type, and information to be
transmitted.
[0067] In an exemplary embodiment, wherein the power determination
unit configured to determine the uplink transmit power according to
the transmission scenario to which the terminal belongs further
comprising:
[0068] when the transmission scenario to which the terminal belongs
is a first coverage level and a random access preamble is to be
transmitted through a narrowband physical random access channel
(NB-PRACH), determining the uplink transmit power according to a
first transmit power calculation formula and a first power control
parameter; or
[0069] when the transmission scenario to which the terminal belongs
is a second coverage level and a random access procedure message
Msg3, traffic data, uplink control information, or the traffic data
and the uplink control information are to be transmitted through
NB-PUSCH in a single tone, determining the uplink transmit power
according to a second transmit power calculation formula and a
second power control parameter; or
[0070] when the transmission scenario to which the terminal belongs
is a third coverage level and a random access procedure message
Msg3, traffic data, uplink control information, or the traffic data
and the uplink control information are to be transmitted through
NB-PUSCH, determining the uplink transmit power according to a
third transmit power calculation formula and a third power control
parameter; or
[0071] when the transmission scenario to which the terminal belongs
is a fourth coverage level, determining a maximum transmit power as
the uplink transmit power; or
[0072] determining the uplink transmit power according to a
coverage level to which the terminal belongs and relationship
information between the coverage level and a power level
preconfigured by a system.
[0073] In an exemplary embodiment, further comprising an adjustment
unit, configured to adjust the uplink transmit power according to a
transmit power control (TPC) command when the power determination
unit determines the uplink transmit power according to the coverage
level to which the terminal belongs and the relationship
information between the coverage level and a power level preset by
the system, wherein the adjustment comprises a cumulative
adjustment and an absolute adjustment.
[0074] In an exemplary embodiment, further comprising an execution
unit, configured to perform uplink transmission using the
determined uplink transmit power after the power determination unit
determines the uplink transmit power.
[0075] The embodiment of present disclosure also provides a
computer readable storage medium which store program codes for
performance. The storage medium can be configured to store program
codes for performing the method steps according to the above
embodiments.
[0076] Comparing with related prior art, the embodiment of present
disclosure comprises: a terminal determine uplink transmit power
according to a scenario which the terminal belongs. In embodiment
of present disclosure, a terminal determines uplink transmit power
for uplink transmission, which realize a scheme of uplink power
control.
[0077] The other aspects will be apparent from the following
drawings and detail description.
BRIEF DESCRIPTION OF THE DRAWINGS
[0078] The accompanying drawings, which are hereby incorporated by
reference, provide a further understanding of the present
application and constitute a part of this application, and the
illustrative embodiments of the present application and its
description are intended to be illustrative of the present
application and are not to be construed as being unduly limited to
this application. In the drawings:
[0079] FIG. 1 is a flow chart of a method for implementing an
uplink power control according to an embodiment of the present
invention;
[0080] FIG. 2 is a block diagram showing the structure of a
terminal for implementing an uplink power control according to an
embodiment of the present invention;
[0081] FIG. 3 is a flow chart of the method of application example
1 of the present application.
DETAILED DESCRIPTION
[0082] Embodiments hereinafter of the present application will be
described in detail with reference to the accompanying drawings. It
is to be noted that the features of the embodiments and examples in
the present application may be combined with each other randomly
without conflict.
[0083] FIG. 1 is a flow chart of a method for implementing an
uplink transmit power control according to an embodiment of the
present invention, as shown in FIG. 1.
[0084] In step 100, the terminal determines the uplink transmit
power according to the transmission scenario to which the terminal
belongs;
[0085] In an exemplary embodiment, prior to the present step, the
method of the embodiment of the present invention may further
include determining a transmission scenario to which the terminal
belongs according to at least one of the following factors:
transmission capability or mode, the number of subcarriers,
coverage level, channel type, and information to be
transmitted.
[0086] In an exemplary embodiment, the coverage level may be one of
a preset number of levels preset by the system, wherein the preset
number is an integer greater than or equal to 1, and the levels
include at least: the levels indicating different coverage cases,
the levels with different number of repetitions.
[0087] In an exemplary embodiment, the channel type may include:
narrowband physical random access channel (NB-PRACH) or narrowband
physical uplink shared channel (NB-PUSCH).
[0088] In an exemplary embodiment, the information to be
transmitted may include: random access preamble, or random access
procedure message Msg3, or traffic data, or uplink control
information, or traffic data and uplink control information.
[0089] In an exemplary embodiment, the transmission capability or
mode may include: a single tone transmission of which a carrier
bandwidth being a first bandwidth, a single tone (or single
carrier) transmission of which a carrier bandwidth being a second
bandwidth, a multi-tone transmission of which a carrier bandwidth
being a third bandwidth, a multi-tone (or multi-carrier)
transmission of which a carrier bandwidth being a fourth
bandwidth.
[0090] The first bandwidth may be different from the second
bandwidth, for example, the first bandwidth may be 3.75 kHz, the
second bandwidth may be 15 kHz. The third bandwidth may be
different from the fourth bandwidth, for example, the third
bandwidth may be 1.25 kHz, and the fourth bandwidth can be 15 kHz
and the like. The transmission capability or mode of a terminal may
only support a single tone transmission, or support a multi-tone
transmission. A terminal that supports a multi-tone transmission
may also adopt a single tone transmission.
[0091] It is to be noted that determining the transmission scenario
to which the terminal belongs can be achieved by: the terminal
determines its transmission capability or mode according to its
transmission capability or mode configuration information. The
terminal determines the number of subcarriers for uplink
transmission according to whether it adopts a single tone
transmission or a multi-tone transmission, and system configuration
information or scheduling information. The terminal determines the
coverage level according to the system preset coverage level and
the measurement result of the downlink reference signal. The
terminal determines the channel type and the information to be
transmitted according to its uplink transmission procedure. Thus,
after the terminal determines one or more factors such as its
transmission capability or mode, the number of subcarriers,
coverage level, channel type, information to be transmitted, it may
determine the transmission scenario to which it belongs.
[0092] In an exemplary embodiment, determining the uplink transmit
power according to the transmission scenario to which the terminal
belongs may include:
[0093] when the transmission scenario to which the terminal belongs
is a first coverage level and the random access preamble is to be
transmitted through the NB-PRACH, the uplink transmit power is
determined according to a first transmit power calculation formula
and a first power control parameter; or
[0094] when the transmission scenario to which the terminal belongs
is a second coverage level and the random access procedure message
Msg3, the traffic data, the uplink control information, or the
traffic data and the uplink control information are to be
transmitted through the NB-PUSCH in a single tone, the uplink
transmit power is determined according to a second transmit power
calculation formula and a second power control parameter; or
[0095] when the transmission scenario to which the terminal belongs
is a third coverage level and the random access procedure message
Msg3, the traffic data, the uplink control information, or the
traffic data and the uplink control information are to be
transmitted through the NB-PUSCH, the uplink transmit power is
determined according to a third transmit power calculation formula
and a third power control parameter; or
[0096] when the transmission scenario to which the terminal belongs
is a fourth coverage level, it is determined that a maximum
transmit power is the uplink transmit power; or
[0097] the uplink transmit power is determined according to the
coverage level to which the terminal belongs and relationship
information between the coverage level and a power level preset by
the system.
[0098] It is to be noted that the first coverage level, the second
coverage level, the third coverage level, and the fourth coverage
level are used only for the description of the distinction, and do
not have a strict order relationship, nor are they completely
different. One possible case is that the first coverage level, the
second coverage level and the third coverage level represent the
same one or more coverage levels, and the fourth coverage level
represents another one or more coverage levels.
[0099] It is also to be noted that the first transmit power
calculation formula, the second transmit power calculation formula,
and the third transmit power calculation formula may be the
transmit power calculation formulas preset by the system. The first
power control parameter, the second power control parameter, the
third power control parameter may include a parameter configured by
the system through signaling and transmitted to the terminal, or a
preset parameter by the system.
[0100] It is also to be noted that the concept of maximum transmit
power is a common knowledge of those skilled in the art.
[0101] It is also to be noted that the relationship information
between the coverage level and the power level preset by the system
may be a relationship table between the coverage level and the
power level preset by the system.
[0102] In an exemplary embodiment, when determining the uplink
transmit power according to the coverage level to which the
terminal belongs and the relationship information between the
coverage level and the power level preset by the system, the method
of the embodiment of the present invention may further comprise:
the terminal adjusts the uplink transmit power according to the
transmit power control (TPC) command, and the adjustment includes a
cumulative adjustment and an absolute adjustment.
[0103] In an exemplary embodiment, the first transmit power
calculation formula may be one of the following:
P=min{Pmax,PL+TargetPower+(Counter-1)*Step)};
P=min{Pmax,PL+TargetPower+Delta+(Counter-1)*Step)};
[0104] wherein, P is the determined uplink transmit power, Pmax is
a maximum transmit power of the terminal, PL is a downlink path
loss estimated by the terminal, TargetPower is a preamble initial
received target power for random access, Delta is a power offset,
Counter is the number of random access, Step is a power increment
step.
[0105] In an exemplary embodiment, the first power control
parameter may include at least one of: the preamble initial
received target power for random access TargetPower, the power
increment step Step, the power offset Delta;
[0106] wherein, the preamble initial received target power for
random access TargetPower is configured by the system and notified
by signaling, the power increment step Step is configured by the
system and notified by signaling or is preset by the system, the
power offset Delta is configured by the system and notified by
signaling or is preset by the system.
[0107] In an exemplary embodiment, when different transmission
capabilities or modes are used, the preamble initial received
target powers for random access TargetPower are different; or
[0108] the preamble initial received target powers for random
access TargetPower are the same, the power offset Delta includes a
power demand deviation of different transmission capabilities or
modes.
[0109] The transmission capabilities or modes may include at least
one of the following: a single tone transmission of which a carrier
bandwidth being a first bandwidth, a single tone transmission of
which a carrier bandwidth being a second bandwidth, a multi-tone
transmission of which a carrier bandwidth being a third bandwidth,
a multi-tone transmission of which a carrier bandwidth being a
fourth bandwidth.
[0110] In an exemplary embodiment, the power offset Delta can
comprise a power demand deviation of different random access
preambles.
[0111] In the exemplary embodiment, the power increment steps Step
for different transmission capabilities or modes are different; or
the power increment steps Step for different random access
preambles are different;
[0112] wherein when different transmission capabilities or modes
and different random access preambles are used simultaneously, the
power increment steps Step are different.
[0113] In an exemplary embodiment, the second transmit power
calculation formula may be one of the following formulas:
P=min{Pmax,Po+PL};
P=min{Pmax,Po+PL+Delta};
P=min{Pmax,Po+PL+fi};
P=min{Pmax,Po+PL+Delta+fi};
P=min{Pmax,Po+alpha*PL};
P=min{Pmax,Po+alpha*PL+Delta};
P=min{Pmax,Po+alpha*PL+fi};
P=min{Pmax,Po+alpha*PL+Delta+fi};
[0114] wherein, P is the determined uplink transmit power, Pmax is
a maximum transmit power of the terminal, Po is a target received
power parameter, PL is a downlink path loss estimated by the
terminal, alpha is a path loss compensation factor, Delta is a
power offset, fi is a power adjustment amount;
[0115] wherein, the target received power parameter Po is the sum
of a common power parameter Po_nominal and a terminal specific
power parameter Po_UE.
[0116] In an exemplary embodiment, the second power control
parameter may include at least one of: common power parameter
Po_nominal, terminal specific power parameter Po_UE, path loss
compensation factor alpha, power offset Delta and transmit power
control TPC.
[0117] wherein, the common power parameter Po_nominal is configured
by the system and notified by signaling; the terminal specific
power parameter Po_UE is configured by the system and notified by
signaling or is preset by the system; the path loss compensation
factor alpha is configured by the system and notified by signaling
or is preset by the system; the power offset Delta is configured by
the system and notified by signaling or is preset by the system;
the transmit power control TPC is configured by the system and
notified by signaling.
[0118] The second transmit power calculation formula may be one of
the following formulas when the transmission scenario to which the
terminal belongs is a second coverage level and the uplink control
information is to be transmitted by the NB-PUSCH using a single
tone:
P=min{Pmax,Po+PL};
P=min{Pmax,Po+PL+Delta};
P=min{Pmax,Po+PL+fi};
P=min{Pmax,Po+PL+Delta+fi}.
[0119] In an exemplary embodiment, the third transmit power
calculation formula may be one of the following formulas:
P=min{Pmax,Po+PL};
P=min{Pmax,Po+PL+Delta};
P=min{Pmax,Po+PL+fi};
P=min{Pmax,Po+PL+Delta+fi};
P=min{Pmax,Po+alpha*PL};
P=min{Pmax,Po+alpha*PL+Delta};
P=min{Pmax,Po+alpha*PL+fi};
P=min{Pmax,Po+alpha*PL+Delta+fi};
P=min{Pmax,10*log 10(M)+Po+PL};
P=min{Pmax,10*log 10(M)+Po+PL+Delta};
P=min{Pmax,10*log 10(M)+Po+PL+fi};
P=min{Pmax,10*log 10(M)+Po+PL+Delta+fi};
P=min{Pmax,10*log 10(M)+Po+alpha*PL};
P=min{Pmax,10*log 10(M)+Po+alpha*PL+Delta};
P=min{Pmax,10*log 10(M)+Po+alpha*PL+fi};
P=min{Pmax,10*log 10(M)+Po+alpha*PL+Delta+fi};
[0120] wherein, P is the determined uplink transmit power, Pmax is
a maximum transmit power of the terminal, Po is a target received
power parameter, PL is a downlink path loss estimated by the
terminal, alpha is a path loss compensation factor, Delta is a
power offset, fi is a power adjustment amount;
[0121] wherein, M is the transmission resource bandwidth, and the
transmission resource bandwidth M may include at least one of the
following: the number of subcarriers, the number of resource units,
the number of resource blocks.
[0122] wherein, the target received power parameter Po is the sum
of a common power parameter Po_nominal and a terminal specific
power parameter Po_UE.
[0123] In an exemplary embodiment, the third power control
parameter may include at least one of: transmission resource
bandwidth M, common power parameter Po_nominal, terminal specific
power parameter Po_UE, path loss compensation factor alpha, power
offset Delta, transmit power control TPC.
[0124] wherein, the transmission resource bandwidth M is configured
by the system and notified by signaling or is preset by the system;
the common power parameter Po_nominal is configured by the system
and notified by signaling; the terminal specific power parameter
Po_UE is configured by the system and notified by signaling or is
preset by system; the path loss compensation factor alpha is
configured by the system and notified by signaling or is preset by
the system; the power offset Delta is configured by the system and
notified by signaling or is preset by the system; the transmit
power control TPC is configured by the system and notified by
signaling.
[0125] It is to be noted that the second transmit power calculation
formula and the third transmit power calculation formula may be the
same or different.
[0126] The third transmit power calculation formula may be one of
the following formulas when the transmission scenario in which the
terminal belongs is a third coverage level, and the traffic data,
or the traffic data and uplink control information are to be
transmitted through the NB-PUSCH:
P=min{Pmax,10*log 10(M)+Po+alpha*PL};
P=min{Pmax,10*log 10(M)+Po+alpha*PL+Delta};
P=min{Pmax,10*log 10(M)+Po+alpha*PL+fi};
P=min{Pmax,10*log 10(M)+Po+alpha*PL+Delta+fi}.
[0127] In an exemplary embodiment, the terminal transmits the
random access procedure message Msg3, the traffic data, the uplink
control information, or the traffic data and the uplink control
information through the NB-PUSCH may include: the terminal
transmits the random access procedure message Msg3, the traffic
data, the uplink control information, or the traffic data and the
uplink control information through the NB-PUSCH by using a
single-tone transmission, and the transmission resource bandwidth M
is 1.
[0128] In an exemplary embodiment, when different transmission
capabilities or modes are used, there can be at least one of the
following situations:
[0129] the path loss compensation factors alpha are different;
[0130] the common power parameters Po_nominal are different, or the
common power parameters Po_nominal are the same;
[0131] wherein, when the common power parameters Po_nominal are the
same, the terminal specific power parameter Po_UE includes a power
demand deviation of different transmission capabilities or modes,
or the power offset Delta includes a power demand deviation of
different transmission capabilities or modes, or the power
adjustment amount fi includes a power demand deviation of different
transmission capabilities or modes, or the value of transmission
resource bandwidth M is set according to a difference between a
bandwidth of a preconfigured transmission capability or mode and a
bandwidth of one of various transmission capabilities or modes;
[0132] wherein, when different transmission capabilities or modes
are used, one of the following situations may exist:
[0133] the path loss compensation factors alpha are different, or
the common power parameters Po_nominal are different, or the common
power parameters Po_nominal are the same;
[0134] the path loss compensation factors alpha are different and
the common power parameters Po_nominal are different, or the common
power parameters Po_nominal are the same;
[0135] the path loss compensation factors alpha are different and
the common power parameters Po_nominal are the same, or the common
power parameters Po_nominal are different;
[0136] wherein, the transmission capabilities or modes may include
at least one of the following: a single tone transmission of which
a carrier bandwidth being a first bandwidth, a single tone
transmission of which a carrier bandwidth being a second bandwidth,
a multi-tone transmission of which a carrier bandwidth being a
third bandwidth, a multi-tone transmission of which a carrier
bandwidth being a fourth bandwidth.
[0137] The terminal specific power parameter Po_UE includes a power
demand deviation of different transmission capabilities or modes,
which means that the terminal specific power parameter Po_UE is
used to carry the power demand deviation of different transmission
capabilities or modes. The power offset Delta includes a power
demand deviation of different transmission capabilities or modes,
which means that the power offset Delta is used to carry the power
demand deviation of different transmission capabilities or modes,
which may be configured by the system and notified by signaling or
is preset by system. The power adjustment amount fi includes a
power demand deviation of different transmission capabilities or
modes, which comprises that initializing the power adjustment
amount fi according to the power demand deviation of different
transmission capabilities or modes. The value of transmission
resource bandwidth M is set according to a difference between a
bandwidth of a preconfigured transmission capability or mode and a
bandwidth of one of various transmission capabilities or modes,
which includes that setting the value of transmission resource
bandwidth M according to the preset transmission capability or
mode, and for other transmission capabilities or modes having a
bandwidth different from the preset transmission capability or
mode, setting the value of transmission resource bandwidth M
according to the bandwidth difference. For example, setting
transmission through 3.75 kHz carrier bandwidth as a benchmark,
when the 15 kHz carrier bandwidth is used for single carrier
transmission, the value of transmission resource bandwidth M value
is set to 4. For another example, setting transmission through 15
kHz carrier bandwidth as a benchmark, when the 3.75 kHz carrier
bandwidth is used for single carrier transmission, the value of the
transmission resource bandwidth M is set to 1/4.
[0138] It is to be noted that in the embodiment of the present
invention, the maximum transmit power Pmax of the terminal is set
by the system; the path loss compensation factor alpha=1 indicates
full path loss compensation, 0<alpha<1 indicates partial path
loss compensation, and alpha=0 indicates that the uplink transmit
power of the terminal is determined entirely according to the power
control parameters notified by the system through signaling. The
power adjustment fi is initialized according to the system preset
rule and is calculated according to the power adjustment method and
the power adjustment step corresponding to the transmit power
control (TPC) command. The power adjustment method includes the
cumulative adjustment method and the absolute adjustment
method.
[0139] In an exemplary embodiment, after determining the uplink
transmit power, the method of the embodiment of the present
invention may further comprise: step 101, the terminal performs
uplink transmission using the determined uplink transmit power.
[0140] In an exemplary embodiment, the method of the embodiment of
the present invention may further comprise:
[0141] The terminal determines the power headroom report (PHR)
according to a preconfigured transmission scenario and transmits
the power headroom report through the NB-PUSCH.
[0142] Wherein the preconfigured transmission scenario may include
at least one of: single tone transmission, channel type is
NB-PUSCH, transmitting both or either of traffic data and uplink
control information.
[0143] It is to be noted that the preconfigured transmission
scenario is used for the terminal to determine its uplink transmit
power in the scenario. Further, the terminal may determine its
power headroom report in the scenario based on the maximum transmit
power and the determined uplink transmit power. For example, the
preconfigured transmission scenario is using a single tone to
transmit the traffic data through the NB-PUSCH, the terminal
determines its uplink transmit power according to the preconfigured
transmission scenario, and then uses the difference between the
maximum transmit power and the determined uplink transmit power as
its PHR in the scenario.
[0144] The method of implementing the uplink power control
according to the embodiments of the present invention may be
applied to a narrowband internet of things (NB-IoT).
[0145] In the technical schemes of the present invention, the
uplink transmit power is determined by the terminal and then the
uplink transmission is carried out, and the design of the uplink
power control scheme is realized.
[0146] FIG. 2 is a block diagram of a terminal for implementing
uplink power control according to an embodiment of the present
invention. As shown in FIG. 2, the terminal at least includes a
power determination unit 201 which is configured to determine
uplink transmit power according to a transmission scenario to which
the terminal belongs.
[0147] In an exemplary embodiment, the power determination unit 201
may be configured to:
[0148] when the transmission scenario to which the terminal belongs
is a first coverage level and the random access preamble is to be
transmitted through the NB-PRACH, the uplink transmit power is
determined according to a first transmit power calculation formula
and a first power control parameter; or
[0149] when the transmission scenario to which the terminal belongs
is a second coverage level and the random access procedure message
Msg3, the traffic data, the uplink control information, or the
traffic data and the uplink control information are to be
transmitted through the NB-PUSCH in a single tone, the uplink
transmit power is determined according to a second transmit power
calculation formula and a second power control parameter; or
[0150] when the transmission scenario to which the terminal belongs
is a third coverage level and the random access procedure message
Msg3, the traffic data, the uplink control information, or the
traffic data and the uplink control information are to be
transmitted through the NB-PUSCH, the uplink transmit power is
determined according to a third transmit power calculation formula
and a third power control parameter; or
[0151] when the transmission scenario to which the terminal belongs
is a fourth coverage level, determining a maximum transmit power is
the uplink transmit power; or
[0152] the uplink transmit power is determined according to a
coverage level to which the terminal belongs and relationship
information between the coverage level and a power level preset by
the system.
[0153] The terminal of the embodiment of the present invention may
further include an adjustment unit 202, which is configured to
adjust the uplink transmit power according to the transmit power
control (TPC) command when the power determination unit 201
determines the uplink transmit power according to the coverage
level to which the terminal belongs and the relationship
information between the coverage level and the power level preset
by the system, wherein the adjustment includes a cumulative
adjustment and an absolute adjustment.
[0154] The terminal of the embodiment of the present invention may
further include an execution unit 203, which is configured to
perform uplink transmission using the determined uplink transmit
power after the power determination unit 201 determines the uplink
transmit power.
[0155] The terminal of the embodiment of the present invention may
further include a scenario determination unit 200, which is
configured to determine a transmission scenario to which the
terminal belongs according to at least one of the following
factors: transmission capability or mode, the number of
subcarriers, coverage level, channel type and information to be
transmitted.
[0156] In an exemplary embodiment, the terminal that implements the
uplink power control may be a terminal in the NB-IoT.
[0157] The method of the present application is described in more
detail by way of a number of application examples, wherein the
application examples are merely illustrative of the present
application and are not intended to limit the scope of the present
application.
Application Example 1
[0158] The flow diagram of the application example 1 of the present
application is shown in FIG. 3, and the method of the present
application example includes:
[0159] In step 300, determining a transmission scenario to which
the terminal belongs;
[0160] the terminal determines the transmission scenario to which
the terminal belongs according to one or more of the factors such
as the transmission capability or mode, the number of subcarriers,
the coverage level, the channel type, the information to be
transmitted, and the like.
[0161] The transmission capability or mode includes at least one of
the following: single tone transmission of which the carrier
bandwidth being a first bandwidth, single tone transmission of
which the carrier bandwidth being a second bandwidth, the
multi-tone transmission of which the carrier bandwidth being a
third bandwidth, the multi-tone transmission of which the carrier
bandwidth being a fourth bandwidth.
[0162] The first bandwidth may be different from the second
bandwidth, for example, the first bandwidth may be 3.75 kHz, the
second bandwidth may be 15 kHz, and the third bandwidth may be
different from the fourth bandwidth, for example, the third
bandwidth may be 1.25 kHz, the fourth bandwidth may be 15 kHz. The
transmission capability or mode of the terminal may only support
single tone transmission, or may support multi-tone transmission.
The terminal which supports multi-tone transmission may also use a
single tone transmission. The terminal can determine its
transmission capability or mode according to its configuration
information of transmission capability or mode.
[0163] When the terminal uses a single tone transmission, the
number of subcarriers is 1. When the terminal uses a multi-tone
transmission, the number of subcarriers is M, M is greater than 1
and less than or equal to the maximum number of subcarriers. The
terminal may determine the number of subcarriers according to the
system configuration information or scheduling information. For
example, when the terminal transmits a hybrid automatic repeat
request (HARQ) feedback information (e.g., acknowledgment
(ACK)/non-acknowledgment (NACK)) through a narrowband physical
uplink shared channel (NB-PUSCH), the terminal uses a single tone
transmission, and the number of subcarriers is 1. When the terminal
transmits the traffic data through NB-PUSCH, multi-tone
transmission is carried out using M subcarriers according to the
system scheduling information.
[0164] The coverage level may be one of a preset number of levels
preset by the system, wherein the preset number is an integer
greater than or equal to 1, and the levels include at least the
levels indicating different coverage cases, the levels with
different number of repetitions. For example, in this application
example, assuming that the system preset three levels, namely,
coverage level 1, coverage level 2, coverage level 3, and the
maximum coupling loss (MCL) corresponding to these three coverage
levels are, for example, 144 dB, 154B and 164B respectively. These
three coverage levels may also be named as the normal coverage
level, the extended coverage level and the extreme coverage level.
Or these coverage levels may also be named as the basic coverage
level, the robust coverage level and the extreme coverage level.
The coverage level 1 may be used as a non-enhanced coverage level,
the coverage level 2 and the coverage level 3 may be used as
enhanced coverage levels, the coverage level 3 may be used as the
highest coverage level. The terminal may determine its coverage
level according to the downlink measurement results. Terminals of
different coverage levels may use different repetition times or
repetition levels to transmit data.
[0165] The channel type includes narrowband physical random access
channel (NB-PRACH) or narrowband physical uplink shared channel
(NB-PUSCH). NB-PRACH is used to transmit random access preamble for
random access, NB-PUSCH is used to transmit uplink traffic data,
uplink control information, or uplink traffic data and uplink
control information. The uplink control information includes HARQ
feedback information (e.g., ACK/NACK information) and the like.
[0166] After the terminal determines one or more factors of its
transmission capability or mode, number of subcarriers, coverage
level, channel type, information to be transmitted and other
factors, the transmission scenario to which the terminal belongs
may be determined.
[0167] In this application example, for example, the terminal
determines, based on its transmission capability or mode
configuration information, that it only supports a single tone
transmission (where the number of subcarriers is 1) of which a
carrier bandwidth being a first bandwidth (e.g., 3.75 kHz), and
determines that its coverage level is the coverage level 3, and the
uplink control information is to be transmitted through the
NB-PUSCH, then the terminal may determine the transmission scenario
to which it belongs according to the information and perform the
uplink power control accordingly.
[0168] In step 301, the terminal determines the uplink transmit
power according to the transmission scenario to which the terminal
belongs.
[0169] According to the method of implementing the uplink power
control of the embodiments of the present invention, when the
transmission scenario to which the terminal belongs is a fourth
coverage level, the terminal determines a maximum transmit power as
its uplink transmit power. For example, the fourth coverage level
may be the two enhanced coverage levels like coverage level 2,
coverage level 3, or the fourth coverage level may be the highest
coverage level, i.e., the coverage level 3.
[0170] In this application example, since in step 300 the terminal
determines that its coverage level is the coverage level 3, which
belongs to the fourth coverage level, then the terminal determines
the maximum transmit power as its uplink transmit power.
[0171] In step 302, the terminal uses the determined uplink
transmit power for uplink transmission.
Application Example 2
[0172] Examples of this application include firstly determining a
transmission scenario to which the terminal belongs.
[0173] The terminal may determine the transmission scenario to
which the terminal belongs according to at least one of the
following factors: the transmission capability or mode, the number
of subcarriers, the coverage level, the channel type, the
information to be transmitted, and the like, as described in the
application example 1.
[0174] In this application example, for example, the terminal
determines that it supports a multi-tone transmission with a
carrier bandwidth being a fourth bandwidth (e.g., 15 kHz) according
to its transmission capability or mode configuration information,
and determines that the coverage level is the coverage level 1
according to the downlink measurement result, and a random access
preamble is to be transmitted through NB-PRACH by using the
multi-tone transmission, then the terminal may determine the
transmission scenario to which it belongs according to the
information and perform the uplink power control accordingly.
[0175] Secondly, the terminal determines the uplink transmit power
according to the transmission scenario to which the terminal
belongs.
[0176] According to the method of implementing the uplink power
control of the embodiments of the present invention, when the
transmission scenario to which the terminal belongs is a first
coverage level and the random access preamble is to be transmitted
through the NB-PRACH, the terminal determines the uplink transmit
power according to the first transmit power calculation formula and
the first power control parameters. For example, the first coverage
level may be the coverage level 1, i.e., a normal coverage level or
a basic coverage level.
[0177] In the present application example, since the terminal
determines that its coverage level is the coverage level 1, which
belongs to the first coverage level, and the random access preamble
is to be transmitted through the NB-PRACH by using the multi-tone
transmission, the terminal determines the uplink transmit power
according to the first transmit power calculation formula and the
first Power control parameters.
[0178] The first transmit power calculation formula is one of the
following:
P=min{Pmax,PL+TargetPower+(Counter-1)*Step)};
P=min{Pmax,PL+TargetPower+Delta+(Counter-1)*Step)};
[0179] wherein, P is the determined uplink transmit power, Pmax is
a maximum transmit power of the terminal, PL is a downlink path
loss estimated by the terminal, TargetPower is a preamble initial
received target power for random access, Delta is a power offset,
Counter is the number of random access, Step is a power increment
step.
[0180] The first transmit power calculation formula may be a
transmit power calculation formula preset by the system.
[0181] The first power control parameters comprise: the preamble
initial received target power for random access TargetPower, the
power increment step Step, the power offset Delta;
[0182] The preamble initial reception target power for random
access TargetPower is configured by the system and notified by
signaling. The power increment step is configured by the system and
notified by signaling or is preset by the system. The power offset
Delta is configured by the system and notified by signaling or is
preset by the system.
[0183] This application example is also applicable to terminals
which transmit random access preamble by using NB-PRACH of other
transmission capabilities or modes. For example, the terminal
supports a single tone transmission of which a carrier bandwidth
being a first bandwidth (for example, 3.75 kHz) and the coverage
level is the coverage level 1, the terminal is to transmit the
random access preamble through NB-PRACH in a single tone. Or the
terminal supports a single tone transmission of which a carrier
bandwidth being a second bandwidth (e.g., 15 kHz) and the coverage
level is the coverage level 1, the terminal is to transmit the
random access preamble through NB-PRACH in a single tone.
[0184] For situations where transmitting a random access preamble
through NB-PRACH of different transmission capabilities or modes,
the preamble initial received target powers for random access
TargetPower, configured by the system for different transmission
capabilities or modes, are different. For example, the system
configures multiple preamble initial received target power
parameters which are applied to different transmission capabilities
or modes respectively. Or the system configures the same preamble
initial received target power for different transmission
capabilities or modes and uses the power offset Delta to include
the power demand deviations of different transmission capabilities
or modes. For example, the system configures a common preamble
initial received target power parameter for different transmission
capabilities or modes, and the system configures by signaling
multiple sets of power offset Delta parameters applied to different
transmission capabilities or modes, or the system presets different
values of the power offset Delta for different transmission
capabilities or modes.
[0185] In this application example, the power offset Delta may also
be used to include the power demand deviations for different random
access preambles. When it is required that the power offset Delta
needs to include both the power demand deviations for different
transmission capabilities or modes and the power demand deviations
for different ransom access preambles, multiple power offset Delta
parameters may be used, such as two power offsets named as Delta A
and Delta B.
[0186] In this application example, for different transmission
capabilities or modes, different power increment steps Step may be
used. For different random access preambles, different power
increment steps Step may be used. When different transmission
capabilities or modes and different random access preamble are used
together, different power increment steps Step may also be used.
For example, the system configures by signaling or preset multiple
power increment steps Step, to be applied to at least one of the
following: different transmission capabilities or modes, and
different random access preambles.
[0187] Finally, the terminal uses the determined uplink transmit
power for uplink transmission.
Application Example 3
[0188] Examples of this application include: firstly, the terminal
determines a transmission scenario to which the terminal
belongs.
[0189] The terminal may determine the transmission scenario to
which the terminal belongs according to one or more factors of the
transmission capability or mode, the number of subcarriers, the
coverage level, the channel type, the information to be
transmitted, and the like, as described in the application example
1.
[0190] In this application example, for example, the terminal
determines that it supports a multi-tone transmission with a
carrier bandwidth being a fourth bandwidth (e.g., 15 kHz) based on
configuration information of its transmission capability or mode,
and it also determines that the coverage level is the coverage
level 1 according to the downlink measurement result, and the
uplink control information is to be transmitted through NB-PUSCH in
a single tone, therefore the terminal may determine the
transmission scenario to which it belongs according to the
information and performs the uplink power control accordingly.
[0191] Secondly, the terminal determines the uplink transmit power
according to the transmission scenario to which the terminal
belongs.
[0192] According to the method for performing uplink power control
of an embodiment of the present invention, when the transmission
scenario to which the terminal belongs is a second coverage level
and the random access procedure message Msg3, the traffic data, the
uplink control information, or the traffic data and the uplink
control information are to be transmitted through NB-PUSCH in a
single tone, the uplink transmit power is determined according to
the second transmit power calculation formula and the second power
control parameters. For example, the second coverage level may be
the coverage level 1, i.e., the normal coverage level or the basic
coverage level.
[0193] In the present application example, since the terminal
determines that the coverage level is the coverage level 1, which
belongs to the second coverage level, and the uplink control
information is to be transmitted through NB-PUSCH in a single tone,
the terminal determines the uplink transmit power according to the
second transmit power calculation formula and the second power
control parameters.
[0194] The second transmit power calculation formula is one of the
following formulas:
P=min{Pmax,Po+PL};
P=min{Pmax,Po+PL+Delta};
P=min{Pmax,Po+PL+fi};
P=min{Pmax,Po+PL+Delta+fi};
P=min{Pmax,Po+alpha*PL};
P=min{Pmax,Po+alpha*PL+Delta};
P=min{Pmax,Po+alpha*PL+fi};
P=min{Pmax,Po+alpha*PL+Delta+fi};
[0195] In an exemplary embodiment, the second transmit power
calculation formula may be one of the following formulas:
P=min{Pmax,Po+PL};
P=min{Pmax,Po+PL+Delta};
P=min{Pmax,Po+PL+fi};
P=min{Pmax,Po+PL+Delta+fi};
[0196] wherein, P is the determined uplink transmit power, Pmax is
a maximum transmit power of the terminal, Po is a target received
power parameter, PL is a downlink path loss estimated by the
terminal, alpha is a path loss compensation factor, Delta is a
power offset, and fi is a power adjustment amount. The target
received power parameter Po is the sum of a common power parameter
Po_nominal and a terminal specific power parameter Po_UE.
[0197] The second transmit power calculation formula may be the
transmit power calculation formula preset by the system.
[0198] The second power control parameters comprises: a common
power parameter Po_nominal, a terminal specific power parameter
Po_UE, a path loss compensation factor alpha, a power offset Delta,
a transmit power control TPC.
[0199] The common power parameter Po_nominal is configured by the
system and notified by signaling. The terminal specific power
parameter Po_UE is configured by the system and notified by
signaling or is preset by the system. The path loss compensation
factor alpha is configured by the system and notified by signaling
or is preset by the system. The power offset Delta is configured by
the system and notified by signaling or is preset by the system.
The transmit power control TPC is configured by the system and
notified by signaling.
[0200] This application example is also applicable to terminals
which transmit the uplink control information by using NB-PUSCH of
other transmission capabilities or modes. For example, the terminal
supports a single tone transmission of which a carrier bandwidth
being a first bandwidth (for example, 3.75 kHz) and the coverage
level is the coverage level 1, the terminal is to transmit the
uplink control information through NB-PUSCH in a single tone. Or
the terminal supports a single tone transmission of which a carrier
bandwidth being a second bandwidth (e.g., 15 kHz) and the coverage
level is the coverage level 1, the terminal is to transmit the
uplink control information through NB-PUSCH in a single tone.
[0201] This application example is also applicable to terminals
that transmit the random access procedure messages Msg3, or uplink
traffic data, or uplink traffic data and uplink control information
through NB-PUSCH of different transmission capabilities or modes.
For example, the terminal supports a single tone transmission of
which a carrier bandwidth being a first bandwidth (e.g., 3.75 kHz),
the coverage level is the coverage level 1, and the terminal is to
transmit the random access procedure message Msg3, or the uplink
traffic data, or the uplink traffic data and the uplink control
information through NB-PUSCH in a single tone. For another example,
the terminal supports a single tone transmission of which a carrier
bandwidth being a second bandwidth (e.g., 15 kHz), the coverage
level is the coverage level 1, and the terminal is to transmit the
random access procedure message Msg3, or the uplink traffic data,
or the uplink traffic data and the uplink control information
through NB-PUSCH in a single tone.
[0202] For the uplink transmission through the NB-PUSCH of
different transmission capabilities or modes, such as the carrier
bandwidth of the transmission capabilities or modes being 3.75 KHz
or 15 KHz, the path loss compensation factor alpha may be
different. The path loss compensation factor alpha for single tone
transmission or multi-tone transmission may also be different. For
example, the system configures by signaling multiple sets of path
loss compensation factor alpha parameters which are applied to
different transmission capabilities or modes respectively. For
another example, the system preconfigures different path loss
compensation factor alpha for different transmission capabilities
or modes. For another example, the system preconfigures a specific
value of the path loss compensation factor alpha for a specified
transmission capability or mode, the system configures by signaling
the path loss compensation factor alpha for other transmission
capabilities or modes.
[0203] For the uplink transmission through the NB-PUSCH of
different transmission capabilities or modes, such as the carrier
bandwidth of the transmission capabilities or modes being 3.75 KHz
or 15 KHz, the configured common power parameter Po_nominal may be
different. For example, the system configures multiple sets of
common power parameter Po_nominal which are applied to different
transmission capabilities or modes respectively. For another
example, the configured common power parameter Po_nominal is the
same, e.g., the system configures a common power parameter
Po_nominal for different transmission capabilities or modes, and
when the configured common power parameter Po_nominal is the same,
the terminal specific power parameter Po_UE may be used to carry
the power demand deviations of different transmission capabilities
or modes, or the power offset Delta may be used to carry the power
demand deviations of different transmission capabilities or modes,
which can be configured by the system and notified to the terminal
by signaling or is preset by the system, or the power adjustment
amount fi may be used to include the power demand deviations of
different transmission capabilities or modes, or the value of the
transmission resource bandwidth M may be set according to the
difference between the bandwidth of the preset transmission
capability or mode and the bandwidth of one of the various
transmission capabilities or modes.
[0204] The power demand deviation for different transmission
capabilities or modes may be carried by the terminal specific power
parameter Po_UE, which can be implemented as below: For example,
when the system configures the terminal specific power parameter
Po_UE for a terminal with different transmission capabilities or
modes, the system carries out the parameter configuration
considering the power demand deviation for different transmission
capabilities or modes. In addition, for different transmission
capabilities or modes, the value range of the terminal specific
power parameter Po_UE may be different, for example, the system
configures multiple sets of the terminal specific power parameter
Po_UE with different value ranges, which are applied to different
transmission capabilities or modes respectively.
[0205] The power demand deviation for different transmission
capabilities or modes may be carried by the power offset Delta,
which can be implemented as below: For example, the system
configures by signaling multiple sets of power offset Delta
parameters which are applied to different transmission capabilities
or modes respectively. For another example, the system presets
different values of power offset Delta for different transmission
capabilities or modes, e.g., Delta is set to 0 when the 3.75 kHz
carrier bandwidth is used for transmission, Delta is set to 10*log
10(4)=6 dB when the 15 kHz carrier bandwidth is used for
transmission; or, Delta is set to 0 when the 15 kHz carrier
bandwidth is used for transmission, Delta is set to -10*log 10
(4)=-6 dB when the 3.75 kHz carrier bandwidth is used for
transmission.
[0206] The power demand deviation for different transmission
capabilities or modes may be carried by the power adjustment amount
fi, which can be implemented as below: For example, the adjustment
amount fi is initialized according to the power demand deviation
for different transmission capabilities or modes, e.g., when the
3.75 kHz carrier bandwidth is used for transmission, fi is
initialized to 0, when the 15 kHz carrier bandwidth is used for
transmission, fi is initialized to 10*log 10 (4)=6 dB; or, when the
15 kHz carrier bandwidth is used for transmission, fi is
initialized to 0, when the 3.75 kHz carrier bandwidth is used for
transmission, fi is initialized to -10*log 10 (4)=-6 dB.
[0207] The value of the transmission resource bandwidth M may be
set according to the difference between the bandwidth of the preset
transmission capability or mode and the bandwidth of a different
transmission capability or mode, which includes: setting the value
of transmission resource bandwidth M according to the preset
transmission capability or mode, and for other transmission
capabilities or modes having a bandwidth different from the
bandwidth of the preset transmission capability or the mode,
setting the value of transmission resource bandwidth M according to
the bandwidth difference. For example, setting transmission through
3.75 kHz carrier bandwidth as a benchmark, when the 15 kHz carrier
bandwidth is used for single tone transmission, the value of
transmission resource bandwidth M value is set to 4. For another
example, setting transmission through 15 kHz carrier bandwidth as a
benchmark, when the 3.75 kHz carrier bandwidth is used for single
tone transmission, the value of the transmission resource bandwidth
M is set to 1/4.
[0208] The power offset Delta may also include at least one of the
following: a power demand deviation between different modulation
and coding schemes, a power demand deviation between the
transmission of traffic data and the transmission of uplink control
information, a power demand deviation between the transmission of
traffic data and uplink control information and the transmission of
uplink control information. The system may also implement these
different functions by using multiple power offset parameters.
[0209] When the random access procedure message Msg3 is transmitted
through the NB-PUSCH, the common power parameter Po_nominal may be
the sum of the random access preamble initial received target power
TargetPower and the power offset Delta_Msg3 configured by the
system through signaling or preset by the system. The value of
Delta_Msg3 may be determined by at least one of the following
conditions: when NB-PRACH and Msg3 use the same transmission
capability or mode, and the difference of power demand or SNR
between NB-PRACH and Msg3 is small, Delta_Msg3 may use a value of
which the absolute value is small; when NB-PRACH and Msg3 use
different transmission capabilities or modes, and the difference of
power demand or SNR between NB-PRACH and Msg3 is large, Delta_Msg3
may use a value of which the absolute value is large.
[0210] Finally, the terminal uses the determined uplink transmit
power for uplink transmission.
Application Example 4
[0211] Examples of this application include: firstly the terminal
determines a transmission scenario to which the terminal
belongs.
[0212] The terminal may determine the transmission scenario to
which the terminal belongs according to one or more factors of the
transmission capability or mode, the number of subcarriers, the
coverage level, the channel type, the information to be
transmitted, and the like, as described in the application example
1.
[0213] In this application example, for example, the terminal
determines that it supports a multi-tone transmission with a
carrier bandwidth being a fourth bandwidth (e.g., 15 kHz) based on
configuration information of its transmission capability or mode,
and it also determines that the coverage level is the coverage
level 1 according to the downlink measurement result, and the
uplink traffic data is to be transmitted through NB-PUSCH in a
multi-tone, therefore the terminal may determine the transmission
scenario to which it belongs according to the information and
performs the uplink power control accordingly.
[0214] Secondly, the terminal determines the uplink transmit power
according to the transmission scenario to which the terminal
belongs.
[0215] According to the method for performing uplink power control
of an embodiment of the present invention, when the transmission
scenario to which the terminal belongs is a third coverage level
and the random access procedure message Msg3, the traffic data, the
uplink control information, or the traffic data and the uplink
control information are to be transmitted through NB-PUSCH, the
uplink transmit power is determined according to the third transmit
power calculation formula and the third power control parameter.
For example, the third coverage level may be the coverage level 1,
i.e., the normal coverage level or the basic coverage level.
[0216] In the present application example, since the terminal
determines that the coverage level is the coverage level 1, which
belongs to the third coverage level, and the uplink traffic data is
to be transmitted through NB-PUSCH in a multi-tone, the terminal
determines the uplink transmit power according to the third
transmit power calculation formula and the third power control
parameters.
[0217] The third transmit power calculation formula is one of the
following formulas:
P=min{Pmax,Po+PL};
P=min{Pmax,Po+PL+Delta};
P=min{Pmax,Po+PL+fi};
P=min{Pmax,Po+PL+Delta+fi};
P=min{Pmax,Po+alpha*PL};
P=min{Pmax,Po+alpha*PL+Delta};
P=min{Pmax,Po+alpha*PL+fi};
P=min{Pmax,Po+alpha*PL+Delta+fi};
P=min{Pmax,10*log 10(M)+Po+PL};
P=min{Pmax,10*log 10(M)+Po+PL+Delta};
P=min{Pmax,10*log 10(M)+Po+PL+fi};
P=min{Pmax,10*log 10(M)+Po+PL+Delta+fi};
P=min{Pmax,10*log 10(M)+Po+alpha*PL};
P=min{Pmax,10*log 10(M)+Po+alpha*PL+Delta};
P=min{Pmax,10*log 10(M)+Po+alpha*PL+fi};
P=min{Pmax,10*log 10(M)+Po+alpha*PL+Delta+fi};
[0218] In an exemplary embodiment, the third transmit power
calculation formula may be one of the following formulas:
P=min{Pmax,10*log 10(M)+Po+alpha*PL};
P=min{Pmax,10*log 10(M)+Po+alpha*PL+Delta};
P=min{Pmax,10*log 10(M)+Po+alpha*PL+fi};
P=min{Pmax,10*log 10(M)+Po+alpha*PL+Delta+fi};
[0219] wherein, P is the determined uplink transmit power, Pmax is
a maximum transmit power of the terminal, Po is a target received
power parameter, PL is a downlink path loss estimated by the
terminal, alpha is a path loss compensation factor, Delta is a
power offset, fi is a power adjustment amount, and M is a
transmission resource bandwidth.
[0220] The target received power parameter Po is the sum of a
common power parameter Po_nominal and a terminal specific power
parameter Po_UE.
[0221] The transmission resource bandwidth M may include at least
one of the following: the number of subcarriers, the number of
resource units, the number of resource blocks. For example, M may
be the number of subcarriers.
[0222] The third transmit power calculation formula may be the
transmit power calculation formula preset by the system.
[0223] The third power control parameters comprises: a transmission
resource bandwidth M, a common power parameter Po_nominal, a
terminal specific power parameter Po_UE, a path loss compensation
factor alpha, a power offset Delta, a transmit power control
TPC.
[0224] The transmission resource bandwidth M is configured by the
system and notified by signaling or is preset by the system. The
common power parameter Po_nominal is configured by the system and
notified by signaling. The terminal specific power parameter Po_UE
is configured by the system and notified by signaling or is preset
by the system. The path loss compensation factor alpha is
configured by the system and notified by signaling or is preset by
the system. The power offset Delta is configured by the system and
notified by signaling or is preset by the system. The transmit
power control TPC is configured by the system and notified by
signaling.
[0225] The downlink path loss PL is estimated by the terminal
according to the downlink reference signal, and the system
transmits the reference signal power to the terminal by signaling.
The terminal obtains the reference signal received power by
measurement and uses the difference between the reference signal
power and reference signal received power as the estimated value of
the downlink path loss PL.
[0226] The NB-IoT system currently includes three deployment
scenarios, i.e., Stand-alone, using Guard-band of an LTE system,
and using a physical resource block of an LTE system (In-band). For
stand-alone scenario, the NB-IoT system uses independent carrier
resource and may exclusively have the downlink transmission power
for the independent carrier resource. For the Guard-band scenario,
the NB-IoT system uses a resource block located in the LTE carrier
Guard-band, and the NB-IoT system may exclusively have the downlink
transmission power for the resource block or share the downlink
transmission power with the LTE system. For the In-band scenario,
the NB-IoT system uses a resource block located on the LTE carrier
and needs to share the downlink transmission power with the LTE
system. For these three scenarios, the NB-IoT system may configure
corresponding reference signal power parameters according to the
usage of the downlink transmit power and transmit the parameters by
signaling to the terminal for PL estimation. As the bandwidth of
the NB-IoT system is very narrow, when the terminal obtains the
reference signal received power by measurement, such measurement
and processing may be carried out in multiple time domain
sub-frames in order to improve the accuracy of measurement.
[0227] The present application example is also applicable to a
terminal transmitting a random access procedure message Msg3, or
traffic data, or uplink control information, or traffic data and
uplink control information through NB-PUSCH in a single tone. For
these terminals, the value of the number of subcarriers M is 1, and
the value of the number of subcarriers M may be set to 1 by
default, which needs no configuration by the system and
notification by signaling.
[0228] This application example is also applicable to terminals
that transmit the random access procedure messages Msg3, or uplink
traffic data, or uplink control information, or uplink traffic data
and uplink control information through NB-PUSCH of different
transmission capabilities or modes. For example, the terminal
supports a single tone transmission of which a carrier bandwidth
being a first bandwidth (e.g., 3.75 kHz), the coverage level is the
coverage level 1, and the terminal is to transmit the random access
procedure message Msg3, or the uplink traffic data, or the uplink
traffic data and the uplink control information through NB-PUSCH in
a single tone. For another example, the terminal supports a single
tone transmission of which a carrier bandwidth being a second
bandwidth (e.g., 15 kHz), the coverage level is the coverage level
1, and the terminal is to transmit the random access procedure
message Msg3, the uplink traffic data, or the uplink traffic data
and the uplink control information through NB-PUSCH in a single
tone.
[0229] For the uplink transmission through the NB-PUSCH of
different transmission capabilities or modes, such as the carrier
bandwidth of the transmission capabilities or modes being 3.75 KHz
or 15 KHz, the path loss compensation factor alpha may be
different. The path loss compensation factor alpha for single tone
transmission or multi-tone transmission may also be different.
[0230] For the uplink transmission through the NB-PUSCH of
different transmission capabilities or modes, such as the carrier
bandwidth of the transmission capabilities or modes being 3.75 KHz
or 15 KHz, the configured common power parameter Po_nominal may be
different. Or the configured common power parameter Po_nominal is
the same, and the terminal specific power parameter Po_UE may be
used to carry the power demand deviations of different transmission
capabilities or modes, or the power offset Delta may be used to
carry the power demand deviations for different transmission
capabilities or modes, and is configured by the system and notified
to the terminal by signaling or is preset by the system, or the
power adjustment amount fi may also be used to include the power
demand variations for different transmission capabilities or modes,
or the value of the transmission resource bandwidth M may be set
according to the difference between the bandwidth of the preset
transmission capability or mode and the bandwidth of one of various
transmission capabilities or modes.
[0231] The power offset Delta may also include at least one of the
following: a power demand deviation between different modulation
and coding schemes, a power demand deviation between the
transmission of traffic data and the transmission of uplink control
information, a power demand deviation between the transmission of
traffic data and uplink control information and the transmission of
uplink control information. The system may also implement these
different functions by using multiple power offset parameters.
[0232] Finally, the terminal uses the determined uplink transmit
power for uplink transmission.
Application Example 5
[0233] Examples of this application include: firstly the terminal
determines a transmission scenario to which the terminal
belongs.
[0234] The terminal may determine the transmission scenario to
which the terminal belongs according to one or more factors of the
transmission capability or mode, the number of subcarriers, the
coverage level, the channel type, the information to be
transmitted, and the like, as described in the application example
1.
[0235] Secondly, the terminal determines the uplink transmit power
according to the transmission scenario to which the terminal
belongs.
[0236] In this application example, the terminal determines the
uplink transmit power according to the coverage level to which the
terminal belongs and relationship information between the coverage
level and a power level preset by the system.
[0237] In this application example, the relationship information
between the coverage level and the power level preset by the
system, for example, may be shown in Table 1 below. The coverage
level 1 corresponds to the power level range [x.about.y] dBm, the
coverage level 2 corresponds to the power level range [p.about.q]
dBm, and the coverage level 3 corresponds to the maximum transmit
power level. The power level range corresponding to the coverage
level 2 may be higher than the power level range corresponding to
the coverage level 1, for example, [x.about.y] dBm may be
(0.about.10] dBm, [p.about.q] dBm may be (10.about.23] dBm, the
maximum transmit power is 23 dBm.
[0238] The terminal may determine the uplink transmit power
according to its coverage level and the relationship information.
When a coverage level corresponds to a plurality of power levels or
a power level range, the terminal may further determine the power
level to be used according to, for example, the downlink reference
signal measurement result, as the uplink transmit power.
TABLE-US-00001 TABLE 1 Coverage level Power level Coverage level 1
[x~y] dBm Coverage level 2 [p~q] dBm Coverage level 3 Maximum
transmit power
[0239] In this application example, the terminal may also adjust
the determined uplink transmit power according to the transmit
power control (TPC) command. For example, the power adjustment fi
is initialized according to the system preset rule (e.g.,
initialized to 0) and then calculated according to the power
adjustment mode and the power adjustment step corresponding to the
received transmit power control (TPC) command to determine the
power adjustment amount fi.
[0240] The power adjustment mode can be a cumulative adjustment
mode or an absolute adjustment mode, which is configured by the
system through signaling or is preset by the system.
[0241] The power adjustment step corresponding to the transmit
power control (TPC) may be a value which has a larger absolute
value for quickly tracking and adjusting the transmission
performance.
[0242] The above application example may not only guarantee the
performance of the NB-IoT uplink transmission, but also reduce the
complexity of uplink power control of the NB-IoT.
[0243] In addition, embodiments of the present invention also
provide a computer-readable storage medium storing
computer-executable instructions that implement the above-described
method of performing uplink power control when executed by a
processor.
[0244] It will be understood by those of ordinary skill in the art
that functional modules/units in all or some of the steps, systems,
and devices described in the methods disclosed herein may be
implemented as software, firmware, hardware, and suitable
combinations thereof. In the hardware embodiment, the division
between the functional modules/units mentioned in the above
description does not necessarily correspond to the division of the
physical unit. For example, a physical component may have multiple
functions, or a function or step may be performed by the
cooperation of several physical components. Some components or all
components may be implemented as software executed by a processor,
such as a digital signal processor or microprocessor, or
implemented as hardware, or implemented as an integrated circuit,
such as a specific integrated circuit. Such software may be
distributed on a computer-readable medium, which may include
computer storage media (or non-transitional media) and
communication media (or transitional media). As is well known to
those of ordinary skill in the art, the term computer storage
medium includes both of volatile and nonvolatile, removable and
non-removable media implemented in any method or technique for
storing information such as computer readable instructions, data
structures, program modules, or other data. Computer storage media
includes, but is not limited to, RAM, ROM, EEPROM, flash memory or
other memory technology, CD-ROM, digital versatile disk (DVD) or
other optical disk storage, magnetic box, magnetic tape, magnetic
disk storage or other magnetic storage device, any other medium
used to store the desired information and which can be accessed by
the computer. In addition, it is well known to those of ordinary
skill in the art that the communication medium typically comprises
computer readable instructions, data structures, program modules,
or other data in modulation data signals such as carriers or other
transmission mechanisms, and may include any information delivery
media.
[0245] While the embodiments disclosed herein are as mentioned
above, the description is for ease of understanding of the present
application and is not intended to be limiting of the present
application. Any person skilled in the art to which this
application pertains may make any modifications and variations in
the form and details of the application without departing from the
spirit and scope of the present application, but the scope of
patent protection of the present application remains as defined in
the appended claims.
INDUSTRIAL UTILITY
[0246] The embodiments of the present application provide a method
and a terminal for realizing the uplink power control. The terminal
determines the uplink transmit power and carries out uplink
transmission, which realizes the design of the uplink power control
scheme.
* * * * *